1. a period of time when there is a lot of pressure to complete something quickly, typically near a deadline
With the project deadline approaching, it's crunch time for the entire team.
Com o prazo do projeto se aproximando, é hora H para toda a equipe.
2. a critical period when quick decisions and hard work are necessary
Finals week is crunch time for most students.
A semana de provas é um momento crítico para a maioria dos estudantes.